package com.example.util;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

/**
 * 解决Filter中注入Bean失败
 */
@Component
public class SpringGetBeanUtil implements ApplicationContextAware {
 
    private static ApplicationContext applicationContext;
 
    @Override
    public void setApplicationContext(ApplicationContext applicationContext)
            throws BeansException {
        if (SpringGetBeanUtil.applicationContext == null) {
            SpringGetBeanUtil.applicationContext = applicationContext;
        }
 
    }
 
    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }
 
    //根据name
    public static Object getBean(String name) {
        return getApplicationContext().getBean(name);
    }
 
    //根据类型
    public static <T> T getBean(Class<T> clazz) {
        return getApplicationContext().getBean(clazz);
    }
    public static <T> T getBean(ApplicationContext context,Class<T> clazz) {
        return context.getBean(clazz);
    }
    public static <T> T getBean(String name, Class<T> clazz) {
        return getApplicationContext().getBean(name, clazz);
    }
 
}